A framework for guaranteeing statistical QoS
Reisslein, M.; Ross, K.W.; Rajagopal, S.
Networking, IEEE/ACM Transactions on
Volume 10, Issue 1, Feb 2002 Page(s):27 - 42
Digital Object Identifier 10.1109/90.986511
Summary:Continuous-media traffic (i.e., audio and video) can tolerate some
loss but have rigid delay constraints. A natural QoS requirement for a
continuous-media connection is a prescribed limit on the fraction of
traffic that exceeds an end-to-end delay constraint. We propose and
analyze a framework that provides such a statistical QoS guarantee to
traffic in a packet-switched network. Providing statistical guarantees
in a network is a notoriously difficult problem because traffic flows
lose their original statistical characterizations at the outputs of
queues. Our scheme uses bufferless statistical multiplexing combined
with cascaded leaky buckets for smoothing and traffic contracting. This
scheme along with a novel method for bounding the loss probability gives
a tractable framework for providing end-to-end statistical QoS. Using
MPEG video traces, we present numerical results that compare the
connection-carrying capacity of our scheme with that of guaranteed
service schemes (i.e., no loss) using GPS and RCS. Our numerical work
indicates that our scheme can support significantly more connections
without introducing significant traffic loss
View citation and abstract |
Cart
